Alaska earthquakes

M4.1 earthquake 228 km SE of Chiniak, Alaska

A magnitude 4.1 earthquake struck 228 km SE of Chiniak, Alaska on Mon, Jan 29, 2018, 3:42 AM AKST (12:42 UTC), 21 km (13 mi) below the surface.

A larger quake followed: M5.4 252 km ESE of Chiniak, Alaska. This one was a foreshock.

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Map

Where this earthquake was located, with the others nearby. Select one for its page.

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The earthquake

Magnitude: 4.1 (ml), light
Local time: Mon, Jan 29, 2018, 3:42 AM AKST
UTC: 2018-01-29 12:42:35 UTC
Depth: 21.4 km (13.3 mi), shallow
Epicenter: 56.059° N, 149.838° W
Region: Alaska
Tsunami flag: No
Status: Reviewed by a seismologist

Did you feel it?

No one has reported feeling this quake to the USGS.

How well it is located

Reviewed by a seismologist.

Location uncertainty: About 7.9 km horizontally, 9.5 km in depth
Magnitude uncertainty: ±0.05
Depth from: From location
Station coverage gap: 192°, poorly surrounded by stations
Stations used: 184

Nearest places

Distance and direction from each place to the epicenter, with its forecast.

Nearby

Within 100 km, magnitude 1.5 and up: at least 201 in the 60 days after this one and at least 200 in the 30 days before it.

After

The first 60 of at least 201.

Before

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event us2000cqwq (also filed as ak18228836, ak0181c5zcm2). Read Mon, Sep 28, 2026, 3:04 PM UTC.